RLY. CARRIAGE FAN 140V AC, 450 MM SWEEP FIXED TYPE FAN AS PER RDSO SPECN NO RDSO/ PE/ SPEC/ TL/ 0050- 2010 ( REV. 1 ) FAN BODY ( DEEP DRAWN ) AND FAN GUARD AS PER DRG. NO ICF/ SK 3- 7- 6- 026 ALT- b ( COL- 1 ), Fans to be supplied in assembled condition.